Hand fire extinguisher



'41 i rjg -Q j May 8, 1945. s BQAL 2,375,615

HAND FIRE EXTINGUISHER Filed May 14. 1942 Patented'May 8, 1945 StewartBoal, Chicago, Laboratories, Inc.,

of Illinois lll assignor to Randolph Chicago, Ill., a corporationApplication May 14, 1942, serial No.442,9o4

` 1 claim. (o1. 169-31) Thls/ invention relates .to a portable fireextinguisher using carbon dioxide' as the extinguishing agent, and whichis so designed and constructed that the extinguisher may-.be` carried,directed, and operated' by one hand, leaving the vother hand entirelyfree.

One of the objects of my invention is to produce a xed self-directingoutlet as an integral part of the device and located in alignment withthe thumb-actuated trigger and handle so that the extinguishing fluidmay be accurately directed and controlled by the use of but one hand.

Another object is to provide for bettercontrol of the direction andquantity of the extinguishing fluid by mounting the trigger directlyover the handle so that it may be readily actuated bydownward pressureof the thumb which would be in its natural position when the hand graspsthe handle. I

Another object is to provide a horn for controlling the proper admixtureof the discharged carbon dioxide with a minimum entrapment of air, andmeans for mounting the horn in a fixed position upon the extinguisherand opposite the handle or grip and the trigger.

Further objects are to provide a construction i of maximum simplicity,efciency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby. l

The invention further resides in the vconstruction, combination andarrangement of parts illustrated in the accompanying drawing, and whilethere is shown therein a preferred embodiment, it is to be understoodthat the same is the purpose of accurately controlling the liberatingmechanism, a horn, one end of which surrounds the nozzle and which isanchored in operating position by the nozzle itself.

Referring more particularly to the novel illustrative embodimentdisclosed in the drawing, the numeral I represents the usual tubular orcylinder container having a threaded opening 2 at the top of thecylinder. A valve assembly 3 made of brass or other suitable material isprovided with a threaded portion 4 which screws into the threadedopening 2. The valve assembly or housing 3 contains a valve mechanismcomprising a plunger 5 having a detachable valve 5a carrying a packingring 6 or washer, which is adapted to be raised and form sealingengagement with the valve seat 1. The valve is designed to be held inclosed position by an expansible spring 8 and the pressure of the carbondioxide until the plunger 5 is manually depressed by a downward motionon the trigger 9. Trigger 9 is attached to a lever I0 which is pivotedat II. Intermediate the pivot II and the trigger 9 is an aperture I2forreceiving a locking pin I3, which when in place, prevents the leverfrom being suiiiciently depressed to actuate the plunger 5 and unseatthe valve. It will thus be seen that when the pin I3' is removed and thetrigger 9 is pushed downwardly, a downward pressure is exerted upon theplunger 5 which opens the valve and permits apassage of the uid upwardsaround the\ valve and out through the nozzle aperture I4 which connectsthrough adjoining openings with interior of the susceptible ofmodincation and change,l and comprehends other details, arrangements ofparts, features and constructions without departing from the spiritofthe invention. a

In the drawing:

Figure 1 is a side Yview of the fire extinguisher.

Figure 2 is an enlarged fragmentary view in vertical cross-section ofthe upper portion of the fire extinguisher showing the operating mecha-1 nism and mounting of the horn in xed position upon the extinguisher.

I have embodied -the foregoing objects in a construction which affordsan easily portable nent position and readily noticeable to make theaiming obvious, aI convenient thumb-actuated Y, trigger or leverimmediately over the handle for valve assembly. The handle I5 is screwedinto the housing 3 at an opening I6 in the housing, which opening isplaced at a suitable distance directly below the trigger 9 to facilitateoper--v ation. A fixed stationary horn I1 is positioned on the housingdirectly opposite to or in alignment with the' handle I5, and is sodesigned as tol be held in place by screwing the cap or nozzle I 8 overthe nozzle connector I 9 against an in turned an'ge 20 on the base o fthe horn and thereby anchoring the horn in fixed position.` It will thusbe seen that when the cap or nozzle I8 is screwed tightly against theinwardly projecting annular flange of the horn I1 that the horn is heldin a fixed position and is in a straight line with the handle I5 and thetrigger 9.

Having thus described the invention,.I claim: A one hand operationportable re extinguisher comprising a cylinder adapted to containvcarbon dioxide under pressure, a valve for releasing the contents of thecylinder, a nozzle and a rigid 2 2,375,615 and stationary horn in xedposition for directcharge of the contents when the trigger is deing andcontrolling the discharge of said conpressed and means comprising a.locking pin extents, a handle for carrying the fire extinguishtendingthrough said trigger for preventing acer, said handle being locateddiametrically oppo-A eidental displacement of said trigger when said vsite said horn and nozzle, a thumb-actuate 5 valve isclosed. triggerlocated immediately above said handle. STEWART BOAL. means whereby thevalve is held open for dis-

